Articles | Volume 38, issue 2
Ann. Geophys., 38, 575–590, 2020
https://doi.org/10.5194/angeo-38-575-2020
Ann. Geophys., 38, 575–590, 2020
https://doi.org/10.5194/angeo-38-575-2020

Regular paper 24 Apr 2020

Regular paper | 24 Apr 2020

Plasma density gradients at the edge of polar ionospheric holes: the absence of phase scintillation

Luke A. Jenner et al.

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Latest update: 14 May 2021
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Short summary
The boundary of regions with a plasma density much lower than background was investigated in the northern polar cap using observations of ionospheric plasma density. Similar regions with an above-background density have been linked to fluctuations in phase and amplitude in radio waves traversing the density gradient at their boundary. These fluctuations were absent through the gradient in the below-background regions; thus, a minimum of both density and gradient are required for scintillation.